timelapsechart

README

timelapsechart-go

Go library to generate a time-lapse bar chart in SVG format.

usage

package main

import (
    "bytes"
    "fmt"
    "log"

    "github.com/jimareed/timelapsechart-go"
)

func main() {

    csv, err := os.Open("input.csv")
    if err != nil {
        log.Fatalln(err)
    }
    defer csv.Close()

    data := timelapsechart.Data{}
    err = data.ReadCSV(csv, []string{"country", "date", "total"})
    if err != nil {
        log.Fatalln("Couldn't open the csv file", err)
    }

    chart := timelapsechart.New("Covid Cases", "bar", timelapsechart.Config{})
    chart.AddData(&data)

    buffer := bytes.NewBuffer([]byte{})
    chart.Render(buffer)
    fmt.Println(buffer)
}

Sources

• dataframe-go
• covid-19-data

Documentation

Index

• type BarChart
• type Chart
  • func New(title string, chartType string, config Config) *Chart
  • func (chart *Chart) AddData(data *Data) error
  • func (chart *Chart) AddLabels(labels []string)
  • func (chart *Chart) GetColor(index int) string
  • func (chart *Chart) RectWidth(value float64) float64
  • func (chart *Chart) Render(buffer *bytes.Buffer) error
  • func (chart *Chart) Table()
• type Config
• type Data
  • func (data *Data) AddCategory(newCategory string) error
  • func (data *Data) GetMaxValue() float64
  • func (data *Data) GetValue(category int, index int) float64
  • func (data *Data) GetValue2(category int, index int) float64
  • func (data *Data) ReadCSV(r io.ReadSeeker, cols []string) error
• type GanttChart
  • func (ganttChart *GanttChart) RectWidth(chart *Chart, value float64) float64

Types

type BarChart

type BarChart struct {
	// contains filtered or unexported fields
}

BarChart

type Chart

type Chart struct {
	Config Config   `json:"config"`
	Title  string   `json:"title"`
	Data   *Data    `json:"data"`
	Type   string   `json:"type"`
	Labels []string `json:"labels"`
}

Chart

func New

func New(title string, chartType string, config Config) *Chart

func (*Chart) AddData

func (chart *Chart) AddData(data *Data) error

func (*Chart) AddLabels

func (chart *Chart) AddLabels(labels []string)

func (*Chart) GetColor

func (chart *Chart) GetColor(index int) string

func (*Chart) RectWidth

func (chart *Chart) RectWidth(value float64) float64

func (*Chart) Render

func (chart *Chart) Render(buffer *bytes.Buffer) error

func (*Chart) Table

func (chart *Chart) Table()

type Config

type Config struct {
	Width     int      `json:"width"`
	Height    int      `json:"height"`
	LabelSize int      `json:"labelSize"`
	ChartX    int      `json:"chartX"`
	ChartY    int      `json:"chartY"`
	Palette   []string `json:"palette"`
}

Config

type Data

type Data struct {
	Categories     []string `json:"categories"`
	TimeRange      []string `json:"timeRange"`
	MaxValue       float64  `json:"maxValue"`
	CategoryColumn string   `json:"categoryColumn"`
	TimeColumn     string   `json:"timeColumn"`
	ValueColumn    string   `json:"valueColumn"`
	Value2Column   string   `json:"value2Column"`
	// contains filtered or unexported fields
}

Data

func (*Data) AddCategory

func (data *Data) AddCategory(newCategory string) error

func (*Data) GetMaxValue

func (data *Data) GetMaxValue() float64

func (*Data) GetValue

func (data *Data) GetValue(category int, index int) float64

func (*Data) GetValue2

func (data *Data) GetValue2(category int, index int) float64

func (*Data) ReadCSV

func (data *Data) ReadCSV(r io.ReadSeeker, cols []string) error

type GanttChart

type GanttChart struct {
	// contains filtered or unexported fields
}

GanttChart

func (*GanttChart) RectWidth

func (ganttChart *GanttChart) RectWidth(chart *Chart, value float64) float64